Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSSUBARU2022IMPREZA BASE, 4D SEDAN, AUTOMATIC CVT TRANSREPAIR AND DIAGNOSISBRAKESTRACTION CONTROLBRAKE CONTROL SYSTEM (DIAGNOSTICS) (EXCEPT HEV)GENERAL DIAGNOSTIC TABLEINSPECTION

2022 Subaru Impreza Base, 4D Sedan, Automatic CVT Trans

General Diagnostic Table: Inspection

2022 Subaru Impreza Base, 4D Sedan, Automatic CVT TransSECTION Inspection

Symptoms		Main probable cause	Other probable cause
Poor brake performance	Long braking/stop ping distance	VDCCM and H/U Brake pad Aeration to brake line Tire specifications, tire wear and air pressures Incorrect wiring or piping connections	Defective ABS wheel speed sensor or sensor gap Defective steering angle sensor or improper neutral position Defective yaw rate and G sensor or improper installation of VDCCM and H/U. Master cylinder Brake caliper Disc rotor Brake pipe Brake booster
	Wheel lock	VDCCM and H/U Defective ABS wheel speed sensor or sensor gap Incorrect wiring or piping connections	Defective steering angle sensor or improper neutral position Defective yaw rate and G sensor or improper installation of VDCCM and H/U. Brake caliper Brake pipe
	Brake drag	VDCCM and H/U Defective ABS wheel speed sensor or sensor gap Master cylinder Brake caliper Parking brake Axle and wheels Brake pedal play	Defective steering angle sensor or improper neutral position Defective yaw rate and G sensor or improper installation of VDCCM and H/U. Brake pad Brake pipe
	Long brake pedal stroke	Aeration to brake line Brake pedal play	VDCCM and H/U Master cylinder Brake caliper Brake pad Brake pipe Brake booster
	Vehicle vertical pitching	VDCCM and H/U Road surface (uneven) Suspension play or fatigue (reduced damping) Incorrect wiring or piping connections	Defective ABS wheel speed sensor or sensor gap Defective steering angle sensor or improper neutral position Defective yaw rate and G sensor or improper installation of VDCCM and H/U.
Poor brake performance	Unstable or uneven braking	VDCCM and H/U Defective ABS wheel speed sensor or sensor gap Brake caliper Brake pad Road surface (uneven) Tire specifications, tire wear and air pressures Incorrect wiring or piping connections	Defective ABS wheel speed sensor or sensor gap Defective steering angle sensor or improper neutral position Defective yaw rate and G sensor or improper installation of VDCCM and H/U. Master cylinder Disc rotor Brake pipe Axle and wheels Road with crowns or banks Suspension play or fatigue (reduced damping)
Vibration or noise When braking suddenly When accelerating rapidly While driving on a slippery road	Excessive brake pedal vibration	Road surface (uneven) Incorrect wiring or piping connections	VDCCM and H/U Brake booster Suspension play or fatigue (reduced damping)
	Noise from VDCH/U	VDCCM and H/U (mount bushing) Defective ABS wheel speed sensor or sensor gap Brake pipe	VDCCM and H/U Defective steering angle sensor or improper neutral position Defective yaw rate and G sensor or improper installation of VDCCM and H/U.
	Noise from the front side of vehicle	VDCCM and H/U (mount bushing) Defective ABS wheel speed sensor or sensor gap Master cylinder Brake caliper Brake pad Disc rotor Brake pipe Brake booster Suspension play or fatigue (reduced damping)	Axle and wheels Tire specifications, tire wear and air pressures
	Noise from the rear side of vehicle	Defective ABS wheel speed sensor or sensor gap Brake caliper Brake pad Disc rotor Parking brake Brake pipe Suspension play or fatigue (reduced damping)	Axle and wheels Tire specifications, tire wear and air pressures
Engine does not accelerate or goes into a stall when accelerating suddenly or driving on a slippery surface.		VDCCM and H/U Defective ABS wheel speed sensor or sensor gap Master cylinder Brake caliper Parking brake Incorrect wiring or piping	Defective steering angle sensor or improper neutral position Defective yaw rate and G sensor or improper installation of VDCCM and H/U. Brake pad Brake pipe
Poor change-direction-operation stability of TCS	Deviation to right or left direction	VDCCM and H/U Defective ABS wheel speed sensor or sensor gap Defective steering angle sensor or improper neutral position Defective yaw rate and G sensor or improper installation of VDCCM and H/U. Brake caliper Brake pad Wheel alignment Road surface (uneven) Road with crowns or banks Tire specifications, tire wear and air pressures Incorrect wiring or piping connections	Disc rotor Brake pipe Axle and wheels Suspension play or fatigue (reduced damping)
Poor change-direction-operation stability of TCS	Vehicle spin	VDCCM and H/U Defective ABS wheel speed sensor or sensor gap Defective steering angle sensor or improper neutral position Defective yaw rate and G sensor or improper installation of VDCCM and H/U. Brake pad Tire specifications, tire wear and air pressures Incorrect wiring or piping connections	Brake caliper Brake pipe
Steering wheel drag while driving		VDCCM and H/U Defective ABS wheel speed sensor or sensor gap Defective steering angle sensor or improper neutral position Defective yaw rate and G sensor or improper installation of VDCCM and H/U. Incorrect wiring or piping connections Power steering system	Brake caliper Brake pad Disc rotor Wheel alignment Road surface (uneven) Road with crowns or banks Suspension play or fatigue (reduced damping) Tire specifications, tire wear and air pressures
VDC operates while driving normally.		VDCCM and H/U Defective ABS wheel speed sensor or sensor gap Defective steering angle sensor or improper neutral position Defective yaw rate and G sensor or improper installation of VDCCM and H/U. Wheel alignment Road surface (uneven) Road with crowns or banks Suspension play or fatigue (reduced damping) Tire specifications, tire wear and air pressures Incorrect wiring or piping connections Power steering system
VDC OFF indicator light does not illuminate when the VDC OFF switch is depressed. NOTE: When pressing VDC OFF switch for 30 seconds or more, VDC OFF indicator light goes off and cannot operate any more. When turning the ignition switch from OFF to ON, the previous status is restored.		Harness Combination meter VDC OFF switch

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.